We use: at for a PRECISE TIME at 3 oclock at 10.30am at sunrise at bedtime at dinnertime at noon at the moment at sunset I have a meeting at 9am. The shop closes at midnight. Jane went home at lunchtime.
We use: in for MONTHS, YEARS, CENTURIES and LONG PERIODS. in the Summer in May in the Ice Age in the past/future in the 1990s in the next century in 1990 in Summer In England, it often snows in December. Do you think we will go to Jupiter in the future? There should be a lot of progress in the next century.
We use: on for DAYS and DATES on Sunday on Sunday on Tuesdays on Tuesdays on 6 March on 6 March on 25 Dec. 2010 on 25 Dec. 2010 Do you work on Mondays? Her birthday is on 20 November. Where will you be on New Years Day?
Notice the use of the preposition of time at in thefollowing standard expressions:Expression Exampleat night The stars shine at night.at the weekend* I dont usually work at the weekend.at Christmas*/Easter I stay with my family at Christmas.at the same time We finished the test at the same time.at present Hes not home at present. Try later.
Notice the use of the prepositions of time in and on inthese common expressions: in on in the morning on Tuesday morning in the mornings on Saturday mornings in the afternoon(s) on Sunday afternoons in the evening(s) on Monday evening
When we say last, next, every, this we do not alsouse at, in, on. I went to London last June. (not in last June) Hes coming back next Tuesday. (not on next Tuesday) I go home every Easter. (not at every Easter) Well call you this evening. (not in this evening)
Remember: in for larger periods of time. on for small periods of time . at for precise periods of time .